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Theorem algcvga 16520

Description: The countdown function 𝐶 remains 0 after 𝑁 steps. (Contributed by Paul Chapman, 22-Jun-2011.)

**Hypotheses**
Ref	Expression
algcvga.1	⊢ 𝐹:𝑆⟶𝑆
algcvga.2	⊢ 𝑅 = seq0((𝐹 ∘ 1^st ), (ℕ₀ × {𝐴}))
algcvga.3	⊢ 𝐶:𝑆⟶ℕ₀
algcvga.4	⊢ (𝑧 ∈ 𝑆 → ((𝐶‘(𝐹‘𝑧)) ≠ 0 → (𝐶‘(𝐹‘𝑧)) < (𝐶‘𝑧)))
algcvga.5	⊢ 𝑁 = (𝐶‘𝐴)

**Assertion**
Ref	Expression
algcvga	⊢ (𝐴 ∈ 𝑆 → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐶‘(𝑅‘𝐾)) = 0))

Distinct variable groups: 𝑧,𝐶 𝑧,𝐹 𝑧,𝑅 𝑧,𝑆 Allowed substitution hints: 𝐴(𝑧) 𝐾(𝑧) 𝑁(𝑧)

Proof of Theorem algcvga Dummy variables 𝑘 𝑚 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		algcvga.5	. . 3 ⊢ 𝑁 = (𝐶‘𝐴)
2		algcvga.3	. . . 4 ⊢ 𝐶:𝑆⟶ℕ₀
3	2	ffvelcdmi 7084	. . 3 ⊢ (𝐴 ∈ 𝑆 → (𝐶‘𝐴) ∈ ℕ₀)
4	1, 3	eqeltrid 2835	. 2 ⊢ (𝐴 ∈ 𝑆 → 𝑁 ∈ ℕ₀)
5		nn0z 12587	. . . 4 ⊢ (𝑁 ∈ ℕ₀ → 𝑁 ∈ ℤ)
6		eluz1 12830	. . . . 5 ⊢ (𝑁 ∈ ℤ → (𝐾 ∈ (ℤ_≥‘𝑁) ↔ (𝐾 ∈ ℤ ∧ 𝑁 ≤ 𝐾)))
7		2fveq3 6895	. . . . . . . . 9 ⊢ (𝑚 = 𝑁 → (𝐶‘(𝑅‘𝑚)) = (𝐶‘(𝑅‘𝑁)))
8	7	eqeq1d 2732	. . . . . . . 8 ⊢ (𝑚 = 𝑁 → ((𝐶‘(𝑅‘𝑚)) = 0 ↔ (𝐶‘(𝑅‘𝑁)) = 0))
9	8	imbi2d 339	. . . . . . 7 ⊢ (𝑚 = 𝑁 → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑚)) = 0) ↔ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑁)) = 0)))
10		2fveq3 6895	. . . . . . . . 9 ⊢ (𝑚 = 𝑘 → (𝐶‘(𝑅‘𝑚)) = (𝐶‘(𝑅‘𝑘)))
11	10	eqeq1d 2732	. . . . . . . 8 ⊢ (𝑚 = 𝑘 → ((𝐶‘(𝑅‘𝑚)) = 0 ↔ (𝐶‘(𝑅‘𝑘)) = 0))
12	11	imbi2d 339	. . . . . . 7 ⊢ (𝑚 = 𝑘 → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑚)) = 0) ↔ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑘)) = 0)))
13		2fveq3 6895	. . . . . . . . 9 ⊢ (𝑚 = (𝑘 + 1) → (𝐶‘(𝑅‘𝑚)) = (𝐶‘(𝑅‘(𝑘 + 1))))
14	13	eqeq1d 2732	. . . . . . . 8 ⊢ (𝑚 = (𝑘 + 1) → ((𝐶‘(𝑅‘𝑚)) = 0 ↔ (𝐶‘(𝑅‘(𝑘 + 1))) = 0))
15	14	imbi2d 339	. . . . . . 7 ⊢ (𝑚 = (𝑘 + 1) → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑚)) = 0) ↔ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘(𝑘 + 1))) = 0)))
16		2fveq3 6895	. . . . . . . . 9 ⊢ (𝑚 = 𝐾 → (𝐶‘(𝑅‘𝑚)) = (𝐶‘(𝑅‘𝐾)))
17	16	eqeq1d 2732	. . . . . . . 8 ⊢ (𝑚 = 𝐾 → ((𝐶‘(𝑅‘𝑚)) = 0 ↔ (𝐶‘(𝑅‘𝐾)) = 0))
18	17	imbi2d 339	. . . . . . 7 ⊢ (𝑚 = 𝐾 → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑚)) = 0) ↔ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0)))
19		algcvga.1	. . . . . . . . 9 ⊢ 𝐹:𝑆⟶𝑆
20		algcvga.2	. . . . . . . . 9 ⊢ 𝑅 = seq0((𝐹 ∘ 1^st ), (ℕ₀ × {𝐴}))
21		algcvga.4	. . . . . . . . 9 ⊢ (𝑧 ∈ 𝑆 → ((𝐶‘(𝐹‘𝑧)) ≠ 0 → (𝐶‘(𝐹‘𝑧)) < (𝐶‘𝑧)))
22	19, 20, 2, 21, 1	algcvg 16517	. . . . . . . 8 ⊢ (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑁)) = 0)
23	22	a1i 11	. . . . . . 7 ⊢ (𝑁 ∈ ℤ → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑁)) = 0))
24		nn0ge0 12501	. . . . . . . . . . . . . . . . 17 ⊢ (𝑁 ∈ ℕ₀ → 0 ≤ 𝑁)
25	24	adantr 479	. . . . . . . . . . . . . . . 16 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → 0 ≤ 𝑁)
26		0re 11220	. . . . . . . . . . . . . . . . 17 ⊢ 0 ∈ ℝ
27		nn0re 12485	. . . . . . . . . . . . . . . . 17 ⊢ (𝑁 ∈ ℕ₀ → 𝑁 ∈ ℝ)
28		zre 12566	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ ℤ → 𝑘 ∈ ℝ)
29		letr 11312	. . . . . . . . . . . . . . . . 17 ⊢ ((0 ∈ ℝ ∧ 𝑁 ∈ ℝ ∧ 𝑘 ∈ ℝ) → ((0 ≤ 𝑁 ∧ 𝑁 ≤ 𝑘) → 0 ≤ 𝑘))
30	26, 27, 28, 29	mp3an3an 1465	. . . . . . . . . . . . . . . 16 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → ((0 ≤ 𝑁 ∧ 𝑁 ≤ 𝑘) → 0 ≤ 𝑘))
31	25, 30	mpand 691	. . . . . . . . . . . . . . 15 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → (𝑁 ≤ 𝑘 → 0 ≤ 𝑘))
32		elnn0z 12575	. . . . . . . . . . . . . . . . 17 ⊢ (𝑘 ∈ ℕ₀ ↔ (𝑘 ∈ ℤ ∧ 0 ≤ 𝑘))
33	32	simplbi2 499	. . . . . . . . . . . . . . . 16 ⊢ (𝑘 ∈ ℤ → (0 ≤ 𝑘 → 𝑘 ∈ ℕ₀))
34	33	adantl 480	. . . . . . . . . . . . . . 15 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → (0 ≤ 𝑘 → 𝑘 ∈ ℕ₀))
35	31, 34	syld 47	. . . . . . . . . . . . . 14 ⊢ ((𝑁 ∈ ℕ₀ ∧ 𝑘 ∈ ℤ) → (𝑁 ≤ 𝑘 → 𝑘 ∈ ℕ₀))
36	4, 35	sylan 578	. . . . . . . . . . . . 13 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℤ) → (𝑁 ≤ 𝑘 → 𝑘 ∈ ℕ₀))
37	36	impr 453	. . . . . . . . . . . 12 ⊢ ((𝐴 ∈ 𝑆 ∧ (𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘)) → 𝑘 ∈ ℕ₀)
38	37	expcom 412	. . . . . . . . . . 11 ⊢ ((𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → (𝐴 ∈ 𝑆 → 𝑘 ∈ ℕ₀))
39	38	3adant1 1128	. . . . . . . . . 10 ⊢ ((𝑁 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → (𝐴 ∈ 𝑆 → 𝑘 ∈ ℕ₀))
40	39	ancld 549	. . . . . . . . 9 ⊢ ((𝑁 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → (𝐴 ∈ 𝑆 → (𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀)))
41		nn0uz 12868	. . . . . . . . . . . . 13 ⊢ ℕ₀ = (ℤ_≥‘0)
42		0zd 12574	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ 𝑆 → 0 ∈ ℤ)
43		id 22	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ 𝑆 → 𝐴 ∈ 𝑆)
44	19	a1i 11	. . . . . . . . . . . . 13 ⊢ (𝐴 ∈ 𝑆 → 𝐹:𝑆⟶𝑆)
45	41, 20, 42, 43, 44	algrf 16514	. . . . . . . . . . . 12 ⊢ (𝐴 ∈ 𝑆 → 𝑅:ℕ₀⟶𝑆)
46	45	ffvelcdmda 7085	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → (𝑅‘𝑘) ∈ 𝑆)
47		2fveq3 6895	. . . . . . . . . . . . . . 15 ⊢ (𝑧 = (𝑅‘𝑘) → (𝐶‘(𝐹‘𝑧)) = (𝐶‘(𝐹‘(𝑅‘𝑘))))
48	47	neeq1d 2998	. . . . . . . . . . . . . 14 ⊢ (𝑧 = (𝑅‘𝑘) → ((𝐶‘(𝐹‘𝑧)) ≠ 0 ↔ (𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0))
49		fveq2 6890	. . . . . . . . . . . . . . 15 ⊢ (𝑧 = (𝑅‘𝑘) → (𝐶‘𝑧) = (𝐶‘(𝑅‘𝑘)))
50	47, 49	breq12d 5160	. . . . . . . . . . . . . 14 ⊢ (𝑧 = (𝑅‘𝑘) → ((𝐶‘(𝐹‘𝑧)) < (𝐶‘𝑧) ↔ (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))))
51	48, 50	imbi12d 343	. . . . . . . . . . . . 13 ⊢ (𝑧 = (𝑅‘𝑘) → (((𝐶‘(𝐹‘𝑧)) ≠ 0 → (𝐶‘(𝐹‘𝑧)) < (𝐶‘𝑧)) ↔ ((𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘)))))
52	51, 21	vtoclga 3565	. . . . . . . . . . . 12 ⊢ ((𝑅‘𝑘) ∈ 𝑆 → ((𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))))
53	19, 2	algcvgb 16519	. . . . . . . . . . . . 13 ⊢ ((𝑅‘𝑘) ∈ 𝑆 → (((𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))) ↔ (((𝐶‘(𝑅‘𝑘)) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))) ∧ ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))))
54		simpr 483	. . . . . . . . . . . . 13 ⊢ ((((𝐶‘(𝑅‘𝑘)) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))) ∧ ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0)) → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))
55	53, 54	syl6bi 252	. . . . . . . . . . . 12 ⊢ ((𝑅‘𝑘) ∈ 𝑆 → (((𝐶‘(𝐹‘(𝑅‘𝑘))) ≠ 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) < (𝐶‘(𝑅‘𝑘))) → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0)))
56	52, 55	mpd 15	. . . . . . . . . . 11 ⊢ ((𝑅‘𝑘) ∈ 𝑆 → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))
57	46, 56	syl 17	. . . . . . . . . 10 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))
58	41, 20, 42, 43, 44	algrp1 16515	. . . . . . . . . . 11 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → (𝑅‘(𝑘 + 1)) = (𝐹‘(𝑅‘𝑘)))
59	58	fveqeq2d 6898	. . . . . . . . . 10 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → ((𝐶‘(𝑅‘(𝑘 + 1))) = 0 ↔ (𝐶‘(𝐹‘(𝑅‘𝑘))) = 0))
60	57, 59	sylibrd 258	. . . . . . . . 9 ⊢ ((𝐴 ∈ 𝑆 ∧ 𝑘 ∈ ℕ₀) → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝑅‘(𝑘 + 1))) = 0))
61	40, 60	syl6 35	. . . . . . . 8 ⊢ ((𝑁 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → (𝐴 ∈ 𝑆 → ((𝐶‘(𝑅‘𝑘)) = 0 → (𝐶‘(𝑅‘(𝑘 + 1))) = 0)))
62	61	a2d 29	. . . . . . 7 ⊢ ((𝑁 ∈ ℤ ∧ 𝑘 ∈ ℤ ∧ 𝑁 ≤ 𝑘) → ((𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝑘)) = 0) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘(𝑘 + 1))) = 0)))
63	9, 12, 15, 18, 23, 62	uzind 12658	. . . . . 6 ⊢ ((𝑁 ∈ ℤ ∧ 𝐾 ∈ ℤ ∧ 𝑁 ≤ 𝐾) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0))
64	63	3expib 1120	. . . . 5 ⊢ (𝑁 ∈ ℤ → ((𝐾 ∈ ℤ ∧ 𝑁 ≤ 𝐾) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0)))
65	6, 64	sylbid 239	. . . 4 ⊢ (𝑁 ∈ ℤ → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0)))
66	5, 65	syl 17	. . 3 ⊢ (𝑁 ∈ ℕ₀ → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐴 ∈ 𝑆 → (𝐶‘(𝑅‘𝐾)) = 0)))
67	66	com3r 87	. 2 ⊢ (𝐴 ∈ 𝑆 → (𝑁 ∈ ℕ₀ → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐶‘(𝑅‘𝐾)) = 0)))
68	4, 67	mpd 15	1 ⊢ (𝐴 ∈ 𝑆 → (𝐾 ∈ (ℤ_≥‘𝑁) → (𝐶‘(𝑅‘𝐾)) = 0))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 394 ∧ w3a 1085 = wceq 1539 ∈ wcel 2104 ≠ wne 2938 {csn 4627 class class class wbr 5147 × cxp 5673 ∘ ccom 5679 ⟶wf 6538 ‘cfv 6542 (class class class)co 7411 1^st c1st 7975 ℝcr 11111 0cc0 11112 1c1 11113 + caddc 11115 < clt 11252 ≤ cle 11253 ℕ₀cn0 12476 ℤcz 12562 ℤ_≥cuz 12826 seqcseq 13970

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2701 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7727 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189

This theorem depends on definitions: df-bi 206 df-an 395 df-or 844 df-3or 1086 df-3an 1087 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2532 df-eu 2561 df-clab 2708 df-cleq 2722 df-clel 2808 df-nfc 2883 df-ne 2939 df-nel 3045 df-ral 3060 df-rex 3069 df-reu 3375 df-rab 3431 df-v 3474 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-uni 4908 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-riota 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7858 df-1st 7977 df-2nd 7978 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-er 8705 df-en 8942 df-dom 8943 df-sdom 8944 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-nn 12217 df-n0 12477 df-z 12563 df-uz 12827 df-fz 13489 df-seq 13971

This theorem is referenced by: algfx 16521 eucalgcvga 16527

W3C validator